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Home >> GMC >> 1995 >> Forward Control 6.5 Y, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls - Remove/Install/Overhaul - 4.3L) >> Fuel System >> Throttle Body Injector (TBI) >> Installation

Throttle Body Injector (TBI): Installation

WARNING: This page is about a different variant/trim than selected.
  1. Install fuel filter on nozzle end of fuel injector. Ensure large end of filter faces injector so filter covers raised rib at base of injector. Lubricate small "O" ring with Automatic Transmission Fluid (ATF), and push "O" ring on nozzle end of injector until it presses against injector filter.
  2. Install steel back-up washer (if equipped) in top counterbore of throttle body injector cavity. Lubricate large "O" ring with ATF, and install "O" ring directly over back-up washer. Ensure "O" ring is seated properly in cavity, and is flush with top of throttle body casting.
    CAUTION: Install back-up washer and large "O" ring before installing injector. Improper seating of "O" ring will cause fuel leak.
  3. Install "O" ring on injector. Install injector into cavity by aligning raised lug on injector base with cast-in notch of throttle body cavity. Push down on injector until fully seated. Install fuel meter cover.
Fig 1: Removing Throttle Body Injector
G90I15725Courtesy of GENERAL MOTORS CORP.
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